I've used ExPro for my earlier cameras and they always seemed to be slightly lower capacity than the Olympus, but I'm reasonably happy with them. One started to expand, but the others have been fine....

The part I specified in my write-up is no longer on Amazon. ExPro offer a similar part (https://www.amazon.co.uk/Ex-Pro%C2%AE-Replacement-Nikon-part-EH-4/dp/B0051GLXUO/) that is claimed to be 5A. It...

If you find IS useful, it's worth getting the Panny lens for the GX800 as the body has no IS, whereas the lens does. The 14-42 Oly lens doesn't have IS so you'd be back in the good old days before IS...